Facebook's big show this week was all about Facebook

REUTERS Facebook's F8 event this week was self-indulgent. There were lots of announcements that looked good at first blush but actually have a lot of important details still missing or to be determined.

On the one hand, Mark Zuckerberg's day-one keynote laid out some cool new potential growth areas for the company, including an app store for Facebook Messenger that may help it keep users longer, and a new video advertising network that makes it way more competitive with Google.

That's the kind of thing investors like to see — Facebook doubling down on proven revenue streams like advertising and app installs.

But the rest of the conference was like a selfie, a chance for Facebook to cast itself in a flattering light.

I found it telling that F8, unlike practically every other trade show out there, gave very little space over to its partners or developers. No outside companies, including the 40 developers that Facebook worked like crazy to get their apps ready for Facebook Messenger ready, got a booth on the show floor. (Three developers were given space in the booth about Parse, Facebook's tool for cross-platform mobile development, and the Facebook Messenger booth had a demo station with all the announced partner apps.)

When we talked to developers about what they were doing, it was in the middle of the show floor.

Although partners were mentioned during the keynotes, none were invited on stage. When CTO Mike Schroepfer showed off the Oculus game "EVE: Valkyrie" on stage, he didn't even mention the name of the game, much less the developer. (It was made by CCP Games.)

The overall impression was Facebook, Facebook, Facebook. It was slick, it made Facebook look like rock stars, and judging from the sheer amount of pitches in my inbox for in-person F8 meetings, it left those developers feeling a little left out from the spotlight.

And a lot of the announcements of Facebook's own inventions were short on substance.

First, Facebook CTO Mike Schroepfer gave a list of company's priorities over the next ten years, including virtual reality via the Oculus VR acquisition — even though the Oculus Rift headset still doesn't have an official release date — and artificial intelligence, citing an academic paper that Facebook scientists wrote about learning systems. Even Facebook's tremendous laser-firing Internet drones, are still in early trial.

Then, Oculus Chief Scientist Mike Abrash spent the majority of his presentation presenting us with some common optical illusions, proving that the brain is easily tricked by virtual reality. "All reality is virtual," went the official line.

Facebook can't become a platform by itself. It needs partners to build great things on that platform. And that means it's going to have to share the spotlight.

Note: An earlier version of this story understated the amount of space that Facebook gave partners. While the show was largely centered on Facebook, several keynotes and show sessions mentioned partners and featured their work. The story has been updated.